Reversing mechanism



A. WINTON.

. REVERSING MECHANISM. APPLICATION FILED APR. II, 191s.

1,371,286, V Patented Mar. 15, 1921..

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REVERSING MECHANISM.

Specification of Letters Patent.

Patented Mal-.15, 1921.

Application filed April 11, 1918. Serial No. 227,982.

T 0 @ZZ whom it may concern:

Be it known that I, ALEXANDER WIN'roN, a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Reversing Mechanism, of which the following is a specication.

This invention relates to internal combustion motors, and more particularly to motors of the reversing type.

Internal combustion motors of the reversing type require the use of two sets of cams for actuating the valves, so that when the direction of operation of the motor is reversed the valves will operate in the proper order and sequence.

The present invention has for its object to provide an improved arrangement for altering the c'operating relation between the 'valves and their operating cams, so that proper operating relation can be secured by a simple movement and with simple mechanism which is not likely to get out of order in service.

Further objects of the invention are in part obvious and in part will appear more in detail hereinafter.

The invention comprises the construction and arrangement of parts hereinafter described and claimed.

In the drawings, which represent one suitable embodiment of the invention, Figure 1 is a plan view of the cam shaft pocket, parts being shown in section, and the valve rocker members being omitted for simplicity; Fig. 2 is a side elevation of the operating mechanism; Fig. 3 is a sectional elevation on the line 3 3, Fig. 2, looking in the direction of the arrows; and Fig. 4 is a detail cross section, illustrating the cam shaft and one of the valve rocker members.

Referring to the drawings, 1 indicates the cam shaft pocket, which is of trough shape and which may be provided with a cover for protection of the cams and mechanism therein, although this is not essential.

2 indicates the cam shaft, which is mounted for rotating and sliding movement in suitable bearings 3, and which has a splined or slidable driving connection with the operating gear 4 rotating in bearings 5. 6 indicates the cams for actuating the valves, which in number are proportional to the number of cylinders of the motor.

The

particular form of operating connection between each cam and its valve is not important, the drawings showing for this purpose rocker members 7 provided at one end with rollers 8 resting on the cams and at their opposite end having adjustable abutments 9 to engage the valve stems 10.

Cams 6, in the present construction, are in two series arranged in pairs. Cams zu, for example, are distributed at intervals along..,the shaft and form one series for actuating the valves when the motor is operating in one direction. Cams y are likewise distributed along the shaft and form a second series which actuates the valves when the motor is operating in the opposite direction. Cams m and y are arranged in pairs. In other words, each cam w has its companion cam y, the two cams of each pair being arranged in neighboring relation, preferably closely adjacent. As shown, the cams of each pair are directly adjacent each other with their valve operating cam portions 11 on their outer opposite edges, while the adjacent portions of the cams have inclined surfaces 12 along which the valve rocker rollers ride when shifting the mechanism from one operating position to the other, as will be readily understood.

Assuming that the cams a: are actuating the valves, when it is desired to reverse the direction of operation of the motor, the cam shaft 2 is moved longitudinally toward the left in Fig. 1, and during said motion the valve rocker rollers ride down the inclined surfaces 12 of cams m and then up along the inclined surfaces 12 of cams jz/ to their new positions on the operating portions 11 of cams y. The operating portions 11 of the separate cams in each of the series x and y, of course, are spaced around the axis of the cam shaft in the proper angulairelation so that each series of cams will produce the proper firing order of the motor cylinders.

The operating mechanism for the cam shaft is as follows:

In the frame is mounted a shaft 13 whose outer end is provided with a hand wheel 14 splined to said shaft so that it has slight longitudinal motion thereon. Said wheel lies adjacent a seat 15 on the frame, and outside of said wheel a screw threaded portion 16 of the shaft is provided with a clamping nut 17. By screwing up this nut the hand wheel 14 can be clamped firmly in any osition to which it may be adjusted, therehy locking the mechanism and holding the cam shaft in its new position. Shaft 13 is provided with a small pinion 18 meshing with a large gear segment 19 on a shaft 20 journaled in bearings'21 on the cam shaft pocket. Said shaft is provided with depending arms 22 carrying pins 23 supporting shoes 24, which lie in an annular groove 25 ina collar 26 fixed to the cam shaft 2. The arms 22, therefore, embrace the cam shaft. 'By rotating the hand Wheel 14 the pinion 18 turns the segment 19 thereby producing oscillating motion of shaft 2O and enablin the cam shaft 2 to be shifted longitudinal y in its bearings for the purposes before described.

What I claim is:

In an internal combustion motor, a cam shaft providedwith two series of valve actuatingv cams, driving means yfor said shaft, and means for moving said shaft longitudinally relative to said driving means, comprising an oscillating shaft Whose aXis is transverse to the cam shaft, an arm operatively connecting said oscillating shaft to the cam shaft, a segment on said oscillating shaft, a pinion for operating said segment, means for rotating said pinion, and means for clamping sition. Y y

In testimony whereof I alix my signature.

ALEXANDER WINToN,

said pinion in adjusted po- 30 

